Chemical properties: orange yellow powder. Soluble in concentrated sulfuric acid and pyridine, soluble in sulfolane when heated, but insoluble in ethanol. Melting point 262-265 ℃. Application disperse yellow E-3G is mainly used for polyester fiber dyeing. It is suitable for high temperature and high pressure dyeing, room temperature dyeing and room temperature carrier dyeing or printing flowers. It has good levelness and light fastness up to grade 6-7. It can be dyed in monochrome, or with disperse blue 2BLN or disperse emerald blue s-gl. It can also be dyed in gray, coffee and other colors. It can also be used for dyeing diacetate fiber, triacetate fiber, nylon, acrylic fiber and so on.